Global Patent Index - EP 3099884 A4

EP 3099884 A4 2017-10-18 - HYBRID DRILL BIT HAVING INCREASED SERVICE LIFE

Title (en)

HYBRID DRILL BIT HAVING INCREASED SERVICE LIFE

Title (de)

HYBRIDBOHRMEISSEL MIT ERHÖHTER LEBENSDAUER

Title (fr)

TRÉPAN HYBRIDE DE DURÉE DE VIE ACCRUE

Publication

EP 3099884 A4 (EN)

Application

EP 15743583 A

Priority

  • US 201461934697 P
  • US 201514611167 A
  • US 2015014011 W

Abstract (en)

[origin: WO2015117047A1] A method of improving the service life of a drill bit comprises creating a weldment between load bearing portions of the drill bit where the weldment has a preselected root gap greater than about 25 mils and a preselected root face greater than about 25 mils, and where the weldment has a material property greater than the materials being joined.

IPC 8 full level (invention and additional information)

E21B 10/20 (2006.01); E21B 10/14 (2006.01)

CPC (invention and additional information)

E21B 10/20 (2013.01); E21B 10/14 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

EPO simple patent family

WO 2015117047 A1 20150806; CA 2937946 A1 20150806; CN 105940178 A 20160914; EP 3099884 A1 20161207; EP 3099884 A4 20171018; MX 2016009793 A 20161208; RU 2016135277 A 20180305; SG 11201606085P A 20160830

INPADOC legal status


2017-10-18 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20170920

2017-10-18 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: E21B 10/14 20060101ALI20170914BHEP

2017-10-18 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: E21B 10/20 20060101AFI20170914BHEP

2017-05-10 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2016-12-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20160831

2016-12-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

2016-12-07 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: BA ME